Mattress tufting machine



June 27, 1939.

J. w. DROLL r AL MATTRESS 'IUFTING MACHINE Filed April 20, 1935 4Sheets-Sheet l fiverzZon; 201 M, M94442 w 4/. 0M

June 27, 1939. J w DROLL ETAL 2,163,780

MATTRESS TUFTING MACHINE Filed April 20. 1935 4 Sheets-Sheet 2 June 27,1939. J. w DROLL ET AL 2,163,780

MATTRESS TUFTING MACHINE Filed April 20, 1935 4 Sheets-Sheet 5 lll 2 9 2June 27, 1939. DR LL g AL 2,163,780

' MATTRESS TUFTING MACHINE Filed April 20, 1935 4 Sheets-Sheet 4 mmunlummmmmllnnnnnhllfllllllnlllmlllmum Patented June 27, 1939 UNITEDSTATES PATENT ()EFFIACE MATTRESS TUFTING MACHINE Ware Application April20, 1935, Serial No. 17,428

24 Claims.

The invention relates to mattress tufting machines.

One object of the invention is to provide an improved mattress tuftingmachine which comprises compressors with members for compacting themattress substantially at all points where the tufts are to be appliedand in which the compressors are counterbalanced in their verticalmovement so they may be easily shifted by manual force in theiroperation to receive and compress a mattress.

Another object of the invention is to provide a mattress tufting machinewhich comprises com pressors which are mounted for conjoint pivotalmovement so the mattress can be swung into vertical position forconvenience in the insertion of the tufts, in which the compressors aresubstantially counterbalanced in their vertical movement while they arelocked against swinging movement, so they can be easily operated toreceive and compress a mattress by manual force.

Another object of the invention is to provide a mattress tufting machinein which the compressors are mounted for relative vertical and conjointpivotal movement, in which the compressors are provided with trunnionsextending into the supporting standards which are adapted to move intocoaxial or interfitting relation so the compressors will besubstantially counterbalanced for pivotal movement.

Another object of the invention is to provide a mattress tufting machinewhich comprises compressors which are adapted to be separated andbrought together for receiving and compressing the mattress and arepivotally movable when the mattress is compressed so the mattress can bepositioned vertically for the insertion of the tufts and in which thecompressors are locked against rotation when they are separated andautomatically unlocked for conjoint pivotal movement when thecompressors have been brought together into compressing position.

Another object of the invention is to provide a mattress tufting machinehaving a compressor for the lines of tufts with screw-means forsimultaneously and equidistantly adjusting the members to vary thespacing between the tufts.

Other objects of the invention will appear from the detaileddescription.

The invention consists in the several novel features which arehereinafter set forth and more particularly defined by claims at theconclusion hereof.

In the drawings:

Fig. 1 is an end elevation of a machine embodying the invention, thecompressors being shown separated in position to receive, or for theremoval of, a mattress. Fig. 2 is a similar view showing the compressorswith a compressed mattress and swung into vertical position for tufting.5 Fig. 3 is a plan. Fig. 4 is a transverse section taken on line 44 ofFig. 3. Fig. 5 is a vertical longitudinal section through one end of themachine on line 5-5 of Fig. 4. Fig. 6 is a perspective showing theslidable connection between one end 10 of the compressors and thetrunnions on the compressors respectively. Fig. '7 is a detail of thetrunnions on the compressors in one of the standards of the supportingstructure. Fig. 8 is a perspective showing the trunnions on the compres-15 sors in the position assumed when the compressors are together incompressing position and are free for conjoint swinging movement. Figs.9 and 10 are sections on line l0l0 of Fig. 3, respectively, showing thescrew-means for adjusting the lower and upper compressor members to varythe spacing of the tufts.

The invention is exemplified in a machine comprising a pair of standardsI4 at the ends of the machine, which are rigidly connected together ad-5 jacent their lower ends by a channel-bar l5, and are supported onbases l3 for vertical movement, as hereinafter described, a lowercomp-ressor pivotally supported in and vertically movable with thestandards, and an upper compressor which is vertically sidablerelatively to the lower compressor and in the standards.

The lower compressor comprises a suitable rectangular frame It, pairs oflongitudinally extending bars 2! which are supported by the frame i5 andtransversely adjustable thereonfias hereinafter described, and a seriesof upwardly tapered compressor members I'I, each provided with alongitudinal slot l8 and enlarged openings I!) at the points where thetufts are to be applied to 40 the mattress. and fixed to one pair ofbars 20. Each compressor-member ll extends longitudinally to compressthe mattress for a complete longitudinal line of tufts and the side bars20 of each compressor are slidably held on the frame I6 by a bar 2|.

The lower compressor is supported at either end for vertical movementwith the standards l4 and for pivotal movement therein by .a trunnion 30which fits in cylindrical bearing 3| in one of the standards 14; a blockor bracket 26 integral with trunnion 30; a suspension bar 23 which isfixedly secured by a screw 21 to block 26; a block 25 to which the bar23 is adjustably secured by a pin 24 and a series of holes 24 and whichis fixedly secured to a plate 22 on an end of the lower compressor-framel6. Bar 23 is confined in a channel 28 in block 26 and held therein by acap-plate 29. A plate 32 is secured to the end of each trunnion 30 tohold the frame [6 against endwise movement in standards It.

The upper compressor comprises a rigid rectangular frame 33, a series ofcompressor-members 35 complementary to the members I"! on the lowercompressor, each for compressing the mattress for a completelongitudinal line of tufts and pairs of bars 35 which are carried by,and transversely movable on transverse underlying bars 35 which arefixed to frame 33. The upper compressor has fixedly secured to each ofits ends, a block 42 and a plate M. The upper compressor 33 isadjustably connected at either end by a pin 45 and a series of holes 40to a bar 31, the upper end of which is fitted in a channel in block 42.A trunnion-block 39 is fixedly secured by a screw 53 to each bar 31which moves vertically with the upper compressor and each block 39 isprovided with a vertically elongated laterally projecting stud 55, whichslides vertically in a slot 56 in the standard it. Bar 23, which isfixed to move with the lower compressor and its trunnion block 26, isslidably fitted in a channel 48 in block 39 and in a channel in block42, both of which blocks move with the upper compressor. Bar 31, whichmoves vertically with the upper compressor, is slidably fitted in achannel 49 in the lower trunnion-block 26 and in a channel in the block25 which is fixed to the lower compressor. Capplate i i holds the bar 23in channel 48, and capplate 29 holds bar 3'! in channel 49. These barsand sliding connections with the aforesaid blocks connect the upper andlower compressors for relative rectilinear movement in their separationto receive a mattress and while they are being brought together tocompress the mattress. The vertical movement of the upper compressorrelatively to the standards [4 and the lower compressor is efiected by apair of links or pitmans 58, the upper ends of which are pivotallyconnected to trunnions 60 which project laterally from the blocks 39 andthe studs 45, which move with the upper compressor.

When the compressors are separated, the elonated studs 45 which travelin vertical slots 46 in the standards l4 prevent pivotal movement ofblocks 39 and, through bars 23, 37 and block 25, prevent pivotalmovement of the lower compressor in the cylindrical bearings 3| for thecylindrical studs 3!]. When the upper compressor is lowered, the studs45 pass out of slots 46 and into recesses or open-ended slots 41 whichare provided in the trunnions 30 and plates 32, so that the trunnions 65on the upper compressor will be coaxial with the trunnions 30 on thelower compressor. This occurs when the compressors have been broughttogether into mattress-compressing position and automatically releasesthe compressors for conjoint pivotal movement when the mattress iscompressed. As the studs 55 pass out of slots 41 during the lifting ofthe upper compressor, both compressors become automatically lockedagainst swinging movement.

While the studs 45 on the upper compressor are in interfitting relationwith the trunnions 35 on the lower compressor, the operator can swingthe compressors with the mattress therebetween into vertical positionfor convenience in inserting the tuiting ties through the mattress. Whenthe compressors are in mattress-compressing position, the trunnions 60on the upper compressor are coaxial with the trunnions 30 on the lowercompressor, and this permits the trunnions on the upper compressor torotate in the operating links 58 without displacing them or impartingmovement to the operating connections hereinafter described. The seriesof holes 2 1 in the plate 22 and block 25 permit the lower compressor tobe adjusted on bar 23 for different thicknesses of mattresses, to keepthe desired coaxial relation of the studs 65 and 30. The holes 4i areformed in the plate ll and bracket 42 for pin ll], so that the uppercompressor may be adjusted for the same purpose.

The mechanism for raising and lowering the upper compressor in thestandards 14, and relatively to the lower compressor, comprises ahandwheel 55 which is rotatably mounted in a stud i on one of thestandards M; a sprocket-wheel 52 fixed to rotate with hand-wheel 50; achain 53 operable by sprocket 52; a sprocket-wheel 54 operable by chain53 and journaled on a stud 55 carried by said standard; a pinion 55rotatable with sprocket 54; a gear 57 meshing with pinion 55; a shaft5i, which extends longitudinally between standards M and is fixed torotate with gear 57 and provided with enlarged journals 6'! in bearingsfil in the standards I4; a link 58 pivoted at its lower end to aWrist-pin 59 on gear 57 and at its upper end to a stud 6i) projectingfrom one of the blocks 39 to which the upper compressor is fixed forvertical movement through bar 3?; and a crank 62 with a wrist-pin 59 tooperate a link 58 which has its upper end pivotally connected to thestud 65 on the block 39 for the upper compressor at the opposite end ofthe machine, so that both ends of the upper compressor member will besimultaneously and equidistantly raised and lowered. Shaft 6| isrotatable through an arc of 180 so that wristpins will be in dead-centerpositions when the upper compressor is either in its raised or loweredposition.

In tufting machines in which the compressors are adapted to compress themattress for a series of tufts for the entire mattress, the weight ofthe compressors is such that considerable force is required to lift themand it has been the practice to provide power-means for shifting them tocompress and release the mattress. In order to facilitate manualrelative shifting of the compressors, the invention contemplatesshifting the standards Hi with the lower compressor and the uppercompressor in reverse directions so they will be substantiallycounterbalanced in their relative movements.

For this purpose, the standards I, with which the lower compressor movesvertically, are each movably sustained by a pair of links 63 at the endsof one of the supporting bases [3, and a pair of levers 54 fulcrumed at65 to the upper ends of links 63 and pivoted at 66 to one of thestandards It, and a pair of links 68 which are pivoted at 69 to journals5! which are fixed to the operating shaft 5|. Levers 65 are pivoted at15 to links 68 so that the links will swing the levers on their fulcra65. The link-pivots 69 are disposed at diametrically opposite points onjournals 51 and so that the links 68 will be in their dead-centerpositions when the standards M are raised and when they are lowered. Astop-arm 13 on the lifting crank 62 for the upper compressor is adaptedto engage stops (4 to limit the range of movement of shaft 6i, crank 62and gear 57 to substantially 180. A stop-arm H on gear 51 engages astop-pin 12 on. one of the standards it to limit the rotation of saidgear and shaft GI frame.

during the lowering movement of the standards.

'When the shaft BI is rotated through handwheel and the gearing operatedthereby, links 68 will be operated to swing levers 64 to raise or lowerthe standards l4 relatively to the bases l3, and this occurssimultaneously with the lifting of the upper compressor by thewrist-pins 59 and links 58 which are operated with shaft 6|. Thisexemplifies mechanism for simultaneously lifting the upper compressorand lowering the standards and lower compressor and for simultaneouslylifting the standards and lower compressor and lowering the uppercompressor. In these movements the load of the upper compressor, whilebeing lowered, is substantially counterbalanced by the lifting of thestandards and the lower compressor through the action of lever 64 andlinks 58. Likewise, the load of the standards and lower compressor intheir lowering is substantially counterbalanced by the upper compressor.

The improved mechanism for simultaneously and equidistantly adjustingthe members of each compressor comprises a pair of transverse shafts 11,one at each end of each compressor-frame. Each of said shafts isprovided with a beveled gear 18 which meshes with abeveled gear 19 on alongitudinal shaft 80 which is adapted to be rotated by a crank 630applied toa projecting end thereof to simultaneously rotate both shafts11. The central compressor member 34 is fixed by a bolt 8| to thecompressor-frame so that it is fixed against transverse movement in theframe, because in varying the spacing between the tufts the central lineof tufts is always in the center of the The remaining compressor membersare slidable transversely on their frame.

A series of screw-sleeves'83 are slidable on and rotatable with eachshaft 11, the shafts being square or splined to the sleeves, for thispurpose. Each screw-sleeve is threaded to a plate or lug 82 whichprojects vertically from one of the sidebars of one of thecompressor-members, and is connected by means of an annular groove 85and a plate or lug 84, which is slotted to fit into said groove, to thenext adjacent compressor-member. These slot and groove and threadedconnections between each screw-sleeve and an adjacent compressor-memberand the sliding connection between the sleeve and the screw-sleeveconnected to shaft 11 will cause the next compressor-member to slide onthe shaft and to correspondingly shift all of the remaining adjustablemembers with it while the rotation of each screw will equidistantlyincrease the spacing between all of the members. This exemplifiesscrew-means for simultaneously and equidistantly adjusting the spacingbetween compressor-members.

The operation of the machine will beas follows: Assuming the compressorsto be separated into position shown in Fig. 1, a mattress will be placedonto the lower compressor and supported horizontally thereby. Theoperator will then rotate hand-wheel 50 until a half revolution has beenimparted to shaft GI and the compressors are brought together intomattress-compressing position shown in Figs. 4 and 5. This operation ofsaid shaft will operate links 68 to rock levers 64 and lift standards l4and the lower compressor from the lowered position shown in Fig. l tothe raised position shown in Fig. 4. Simultaneously, the links or pitman58 will be operated to lower the upper compressor in the standards. Theload of the upwardly moving standards l4 and lower compressor willresist the lowering movement of the upper compressor so the compressorswill be operated in substantial counterbalance to theirmattress-compressing position and during such' into vertical position.The levers B4 are proportioned so the standards will be shifted lessthan the upper compressor to compensate for the differential in theweight between the standards and lower compressor, and the uppercompressor. As the upper compressor reaches its lowered position itsstuds 45 will slide into slots 41 in. trunnions 30 which are journaledin the standards l4 and are attached to the lower compressor. Until thestuds 45 enter slots 41 the upper compressor will be locked againstrotation and the lower compressor, by slidable connecting bars 23, 21between the compressors, will also be locked against rotation. When thestuds 45 are seated in the trunnions 30, the trunnions 60 on the uppercompressor will be coaxial with the trunnions 30 of the lower compressorand both compressors will be free and locked together so they can beconveniently swung into vertical position to bring the mattress intovertical position for the insertion of the tufts.

The compressors can be rotated without displacing the operating links 58for the upper compressor because the trunnions 30 and 60 are thencoaxial. When the mattress has been tufted, the compressors are againrotated to a horizontal position to bring the studs 45 in registry withthe lower endof slots 46 in standards l4. The operator will thenreversely rotate the hand-wheel 50 to impart a reverse half revolutionto the shaft 6|. During this operation, links 58 will lift the uppercompressor in and relatively to the standards, the studs 45 sliding inslots 46 serving to lock the compressors against swinging movement.Simultaneously, links 68 and levers 64 will be operated to lower thestandards !4. During this operation the load of the rising uppercompressor will be substantially counterbalanced by the descendingstandards l4 and lower compressor. When the upper compressor is in itsraised position, the operating links 58 and the standard-lifting links58 will be in their deadcenter positions so the compressors andstandards will be self-retained in their assigned positions.

The crank-connections for operating the links 58 pass into dead-centerpositions both when the upper compressor is raised and when it islowered, so that they-will be self-holding or looking in such positionsto retain this compressor in such positions. When the standards are in.either raised or lowered position, the links 68 ated so as to becounterbalanced in their vertical movement, and so that they may beeasily shifted by manual force; in which the supporting standards whichcarry the compressors are vertically movable with one of the compressorsand the other slidably guided thereby with both compressors pivotallymovable for convenience in inserting the tufts; in which the supportingstandards are supported by a system of levers and links and one of thecompressors is oppositely movable simultaneously with the movement ofthe standards; in which the lower compressor is provided with trunnionscarried by the standards and the upper compressor is provided withtrunnions which are guided by the standards and are adapted to move intocoaxial relation with the trunnions onthe lower compressor or tointerfit therewith for permitting conjoint and balanced pivotal movementof the compressors; and in which the members of each compressor areequidistantly and simultaneously adjustable for different spacings oftufts by means of conjointly rotatable and relatively slidab-lescrewsleeves operable from a common shaft.

The invention is not to be understood as restricted to the details setforth, since these may be modified within the scope of the appendedclaims, without departing from the spirit and scope of the invention.

Having thus described the invention, what we claim as new and desire tosecure by Letters Patent is:

1. In a mattress tufting machine, the combination of a support, avertically movable supporting structure carried by the support, an uppercompressor guided for vertical movement in the structure, a lowercompressor mounted in the structure, and mechanism for shifting thestructure vertically and the upper compressor vertically relatively tothe structure.

2. In a mattress tufting machine, the combination of a support, avertically movable sup- 1. porting structure carried by the support, an

upper compressor guided for vertical movement and pivotally movable inthe structure, a lower compressor pivotally mounted in the structure,and mechanism for simultaneously shifting the structure vertically andthe upper compressor vertically relatively to the structure.

3. In a mattress tufting machine, the combination of a support, avertically movable supporting structure carried by the support, an uppercompressor guided for vertical movement in the structure, a lowercompressor mounted in the structure, and mechanism for simultaneouslyshifting the structure and the upper compressor vertically in oppositedirections.

4. In a mattress tufting machine, the combination of a support, avertically movable supporting structure carried by the support, an uppercompressor guided for vertical movement and pivotally movable in thestructure, a lower compressor pivotally mounted in the structure, asliding connection between the compressors, and mechanism forsimultaneously shifting the structure vertically and the uppercompressor vertically relatively to the structure.

5. In a mattress tufting machine, the combination of a support, a pairof vertically movable supporting standards carried by the support, anupper compressor guided for vertical movement in the standards, a lowercompressor mounted in the standards and movable vertically therewith,and mechanism for simultaneously shifting the standards vertically andthe upper compressor vertically relatively to the standards.

6. In a mattress tufting machine, the combination of a support, a pairof vertically movable supporting standards carried by the support, anupper compressor guided for vertical movement in the standards, a lowercompressor mounted to swing in the standards and movable verticallytherewith, and mechanism for simultaneously shifting the standardsvertically and the upper compressor vertically relatively to thestandards.

7. In a mattress tuiting machine, the combination of a support, a pairof vertically movable supporting standards carried by the support, anupper compressor guided for vertical movement in the standards, a lowercompressor mounted to swing in the standards and movable verticallytherewith, and mechanism for simultaneously shifting the standards andthe upper compressor vertically in opposite directions.

8. In a mattress tufting machine, the combination of a support, asupporting structure carried by the support, upper and lower compressorsfor a mattress comprising members for compressing a mattress at allpoints where tufts are to be applied and mounted for conjoint pivotaland relative vertical movements in the structure, connections betweenthe compressors for substantially counterbalancing them for relativevertical movement, and means for operating the compressors.

9. In a mattress tufting machine, the combination of a support, asupporting structure carried by the support, upper and lower compressorsfor a mattress comprising members for compressing a mattress at allpoints Where tufts are to be applied, mounted for relative vertical andfor conjoint pivotal movements in the structure, connections between thecompressors for substantially counterbalancing them for relativevertical movement in opposite directions, and means for operating thecompressors.

10. In a mattress tufting machine, the combination of a support, avertically movable supporting structure carried by the support, upperand lower compressors for a mattress comprising members for com-pressinga mattress at all points where tufts are to be applied, the lowercompressor being mounted to move vertically with the structure, theupper compressor being mounted for vertical movement relatively to thestructure and the lower compressor, and operating connections for thestructure and the upper compressor whereby the compressors will besubstantially counterbalanced during relative vertical movement.

1 1. In a mattress tufting machine, the combination of a supporting basevertically movable supporting standards carried by the base, upper andlower compressors for a mattress comprising members for compressing amattress at all points where tufts are to be applied, the lowercornpressor being mounted to move vertically with the standards, theupper compressor being mounted for vertical movement relatively to thestandards and the lower compressor and operating means for the standardsand the upper compressor comprising means between the compressorswhereby they will be substantially counterbalanced during relativevertical movement.

12. In a mattress tufting machine, the combination of a supportingstructure, upper and lower compressors carried by the structure, for amattress comprising members for compressing a mattress at all pointswhere tufts are to be applied, apivotal connection for the lowercompressor carried by the structure, vertically slidable trunnionsbetween the upper compressor and the supporting structure, movable intocoaxial position with the pivotal connection for the lower compressor,and means for vertically shifting the upper compressor.

13. In a mattress tufting machine, the combination of a supportingstructure, upper and lower compressors carried by the structure, for amattress comprising members for compressing a mattress at all pointswhere tufts are to be applied, trunnions for the lower compressorpivotally carried in the structure, vertically slidable trunnionsbetween the upper compressor and the supporting structure, movable intocoaxial position with the trunnions for the lower compressor, and meansfor vertically operating the upper compressor.

14. In a mattress tufting machine, the combination of a supportingstructure, upper and lower compressors carried by the structure, for amattress comprising members for compressing a mattress at all pointswhere tufts are to be applied, a pivotal connection for the lowercompressor carried by the structure, 'slidable trunnions between theupper compressor and the supporting structure, movable intocoaxialposition with the pivotal connection for the lower compressor,and means for vertically operating the upper compressor comprising alink pivoted to one of the trunnions.

15. In a mattress tufting machine, the combination of a supportingstructure, upper and lower compressors carried by the structure, for amattress comprising members for compressing a mattress at all pointswhere tufts are to be applied, a pivotal connection for the lowercompressor carried by the structure, slidable trunnions between theupper compressor and the supporting structure, movable into coaxialposition with the pivotal connection of the lower compressor androtatable in the structure when in such position, and means forvertically operating the upper compressor.

16. In a mattress tufting machine, the combination of a supportingstructure, compressors for a mattress, one of which comprises a seriesof compressor members and means for simultaneously and equidistantlyadjusting the members relatively to one another for different spacingsof tufts, comprising conjointly rotatable and relatively slidable screwsbetween adjacent members and means for rotating the screws.

17. In a mattress tufting machine, the combination of a supportingstructure, compressors for a mattress, one of which comprises a seriesof compressor members, and means for simultaneously and equidistantlyadjusting the members relatively to one another for different spacingsof tufts, comprising screw-sleeves, having a threaded connection withone member and a shifting connection with an adjacent member, and ashaft for rotating the sleeves, and on which they are slidable.

18. In a mattress tufting machine, the combination of a supportingstructure, compressors for a mattress, one of which comprises a seriesof compressor members, each for a row of tufts, and means forsimultaneously and equidistantly adjusting the members relatively to oneanother for different spacings of tufts, comprising shafts at the endsof the members, and screws slidable on and rotatable by said shafts andconnecting adjacent members.

19. In a mattress tufting machine, the combination of a supportingstructure, compressors for a mattress, one of which comprises a seriesof members for compressing an entire mattress substantially at allplaces to be tufted and for side and intermediate rows of tufts, andmeans for simultaneously shifting'the members comprising rotatablescrew-elements connected to the members respectively, means forconjointly rotating the elements, and means for axially shifting theelements relatively to one another to maintain the same distance betweenthe members when the spacing is varied.

20. In a mattress tufting machine, the combination of a support,supporting standards carried by the support and connected thereto forvertical movement, an upper compressor slidably connected to and pivotedin the standards, a lower compressor mounted in the standards, mechanismfor shifting and supporting the standards vertically and shifting theupper compressor vertically relatively to the standards comprisinglevers connected to the support and to the standards, a shaft carried bythe standards, manually operable gearing for operating the shaft, linksconnected to the shaft and to the levers for rocking the levers to shiftthe standards vertically, and crank-operated links connected to theshaft and to the upper compressor for shifting the latter relatively tothe standards.

21. In a mattress tufting machine, the com.- bination of a support,standards carried by the support and connected thereto for verticalmovement, an upper compressor slidably connected to and pivoted in thestandards, a lower compressor mounted in the standards, mechanism forshifting and supporting the standards vertically comprising leversconnected to the support and to the standards, a shaft, links operableby the shaft and connected to shift the levers for vertically moving thestandards, and means operable by the shaft connected to the uppercompressor for shifting the same relative to the standards.

22. In a mattress tufting machine, the combination of a support, upperand lower frames each carrying compressor members, and means forconnecting the frames to the support for vertical rotation comprisingcoaxial trunnions and adjustable connections between the trunnions andeach of the frames whereby both of the frames can be adjusted to andfrom the axis of the trunnions so the upper and lower compressor memberswill be equidistantly spaced from said axis while the frames are incompressing position for mattresses of different thicknesses.

23. In a mattress tufting machine, the combination of a support, upperand lower frames each carrying compressor members, and means forconnecting the frames to the support for vertical rotation comprisingcoaxial trunnions and slidably adjustable connections between thetrunnions and the frames whereby both of the frames can be adjusted toand from the axis of the trunnions so the upper and lower compressormembers will be equidistantly spaced from said axis while the frames arein compressing position for mattresses of different thicknesses.

24. In a mattress tufting machine, the combination of a support, upperand lower frames each carrying compressor members, and means forconnecting the frames to the support for vertical rotation comprisingcoaxial trunnions rotatably mounted in the support, blocks on thetrunnions and adjustable connections between the blocks and the frameswhereby both of the frames can be adjusted to and from the axis of thetrunnions so the upper and lower compressor members will beequidistantly spaced from. said axis while the frames are in compressingposition for mattresses of different thicknesses.

JOSEPH W. DROLL. ALEX H. OLSON.

